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Commercial Vent
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Commercial Vent
• Engine Company Commercial Vent Training– Objectives• Understand why an inspection hole is important.• Understand the purpose of smoke indicator holes.• How to utilize the 5 cut center rafter cut method.
• This class is a basic overview to prepare for the hands on portion of this training.
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Commercial Vent
• Engine Company Commercial Vent Training– Will utilize 1 saw.– Minimum of two personnel but three is preferred.• Officer (required)• Sawyer (required)• Lookout/Safety (optional but recommended)
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Commercial Vent
• 5 Points of Inspection Hole– Determine the roof covering– Determine the roof decking– Determine the rafter direction– Determine conditions directly underneath– Establish the type of operations that will be
accomplished
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Commercial Vent
• Inspection Hole– This is a triangular cut
with each side approximately 12”.
– The first cut is 45 degrees to an outside wall.
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Commercial Vent
Inspection hole
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Commercial Vent
• Smoke Indicator Hole– Determine smoke and
heat conditions underneath the vent team
– Assists in determining the location of heat hole
– Only large enough to fit handle of rubbish hook into
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Commercial Vent
• 5 Cut Center Rafter Cut (5 Cut)– Simple to use and remember.– Identifies the structural members and allows for
the maximum size of opening between members for heat hole/strip cut
– The louvers do not fall into the ventilation opening.
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Commercial Vent
• A single ventilation hole is a 5 cut.
• When several 5 cuts are put together they are considered “with construction” or “against construction”
“With Construction”
“Against Construction”
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Commercial VentAgainst Construction
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Commercial VentWith Construction
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Commercial Vent
• Vertically ventilating a commercial roof can be a very complex task. Utilizing Truck Companies is recommended when roof operations are needed on commercial roofs.
• This training provides Engine Companies the knowledge and skills to vertically vent a commercial roof when no Truck resources are available or are delayed.
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Commercial Vent
• Hands on training:– Chalk saw station– Rafter rolling, smoke indicator, and inspection hole
station.– Full start to finish evolutions that bring it all together.
• Questions? Contact:– Jason Konieczka [email protected]– Ben Hayman [email protected]– Jimmy Webb [email protected]